Harmful foods for cats: what they are and what ailments they cause

Cats can eat a lot, but there are some foods that can be harmful to them. Here is a small list.

One of the most important elements for a cat’s health is nutrition. Cats can eat a lot as they are insatiable, which is why you have to be careful.

In particular, attention must be paid to the food they eat as not all types of food can be consumed by the feline.

In fact some are really harmful to the health of the cat, let’s see below what they are and specifically what ailment they can cause to the cat.

Harmful food for cats

Usually we tend to confuse cats and dogs by thinking that they have the same metabolism, being both carnivores and being given any type of food.

But this is not the case at all, in addition to having a different metabolism, it is necessary to know that if the dog takes a very small amount of food harmful to him and maybe nothing serious happens to him, it is not the same for the cat as that very small amount could be lethal to him.

This is why it is important to learn what the cat should not eat at all. We therefore advise you to pay close attention to the list below, to prevent the cat from consuming foods that are harmful to him.

Remembering to contact the veterinarian in case the feline has used one of these foods.

Chocolate, coffee and tea

Both chocolate, coffee and tea are very harmful to the health of the cat, as they contain respectively theobromine , caffeine and theophylline, very toxic substances for the cat.

High doses of these foods cause irregular breathing and beating, subsequently causing heart fibrillation in the feline.

Grapes and raisins

Grapes and raisins are also very harmful foods for cats, even if the molecules that cause damage to the cat are still unknown today.

The only certainty is that the cat’s intake of grapes can cause acute renal failure and, in severe cases, coma.

Tomatoes and potatoes

Other foods that are harmful to the cat are green tomatoes and potatoes, as they contain a substance called solanine which causes gastrointestinal problems in cats.

Raw bread dough

Being made up of yeast, raw bread dough can cause digestive and respiratory problems in your cat, as it could expand inside its stomach.

Tuna fish

Despite being fishy, ​​canned tuna can be harmful to your little kitty as it alters the amount of mercury in your cat.

Onion and garlic

Any way you give onion or garlic to your cat, cooked or raw, they are very harmful to him, as they contain a substance called thiosulfate which eliminates red and white blood cells causing anemia in the feline.


Another harmful food for the cat is avocado as the substance contained in the peel, leaves and stone can cause vomiting and diarrhea in the cat.

Raw eggs

A food to absolutely avoid to give to the feline is the raw egg, as the cat‘s stomach cannot digest the bacteria contained in the eggs. It would also risk contracting salmonella like humans.


Although it is a food widely consumed by the cat, the liver, in excessive doses can cause an access of Vitamin A or Retinol, a molecule that if taken in overdose can cause joint pain in the feline.


The candies contain Xylitol, a very toxic sweetener for cats, as it acts on the pancreas and can cause hypoglycemia.

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